Removing a continuous glucose monitor is straightforward: peel the adhesive patch off your skin like a bandage. The entire process takes seconds. But doing it comfortably, caring for your skin afterward, and knowing what to do if something goes wrong are worth a closer look, especially if this is your first time swapping sensors.
Step-by-Step Removal
The process is essentially the same across major CGM brands. For Dexcom G7, you peel off the patch like a bandage. For FreeStyle Libre, Abbott’s instructions are nearly identical: pull up the edge of the adhesive and slowly peel it away from your skin in one smooth motion. There’s no twisting, no special tool, and no button to press. The thin sensor filament beneath the skin slides out with the patch.
If your sensor session hasn’t ended yet, you can either wait for it to expire on its own or stop it manually through your app. Dexcom G7 sensors include a 12-hour grace period after the session ends, giving you flexibility to remove and replace on your own schedule rather than scrambling the moment you get an alert.
Making Removal Less Painful
CGM adhesives are designed to hold tight for 7 to 14 days, which means they can pull at skin and hair when you peel them off. A few techniques help.
Removing the sensor right after a warm shower softens the adhesive and makes the patch release more easily. If you’re not near a shower, pressing a warm, damp cloth over the patch for a minute or two has a similar effect. Peel slowly and keep the patch close to the skin as you pull, rather than lifting straight up. This reduces the tugging sensation.
Dedicated adhesive removers made for skin, like Goo Gone’s bandage remover, dissolve medical-grade adhesive without alcohol or harsh chemicals. You can also use baby oil, coconut oil, or olive oil. Apply the oil around the edges of the patch, let it soak in for a few minutes, then peel. All oil-based products leave residue, so wash the area thoroughly with soap and water afterward, especially if you plan to place your next sensor nearby.
Cleaning and Caring for Your Skin
After removal, gently clean the site and take a look at the skin underneath. Some redness or a faint outline of the patch is normal and typically fades within a day or two.
If the skin is intact but irritated or itchy, a thin layer of over-the-counter hydrocortisone cream once or twice a day calms inflammation. An antihistamine like diphenhydramine (the active ingredient in Benadryl) can help with persistent itching. If the irritation is mild and not bothersome, a basic moisturizing lotion is enough to soothe and protect the area.
If the skin is broken, cracked, or raw, you need a slightly different approach. An over-the-counter antibiotic ointment like bacitracin reduces the risk of infection. Some people find that dabbing liquid antacid (the chalky kind used for heartburn) onto broken, inflamed skin relieves pain surprisingly well. Let it dry into a thin layer. Keep in mind it can rub off on clothing. Watch broken skin closely for signs of infection: spreading redness, heat, pus, or a burning sensation that gets worse instead of better. Those signs warrant a call to your care team.
What to Do if a Sensor Wire Breaks Off
It’s rare, but the thin filament that sits under your skin can occasionally break during removal. If you see a small wire fragment sticking out, don’t try to dig it out yourself. If a wire breaks off and you can’t see it at all, the same rule applies: leave it alone. Dexcom advises contacting their technical support line (available 24/7) and reaching out to your healthcare provider, especially if you notice redness, swelling, or pain at the insertion site. Trying to extract it on your own risks pushing it deeper or causing infection.
Rotating Your Sensor Site
Every time you remove a sensor, you’re choosing where to place the next one. Rotating sites prevents the skin from developing hard, lumpy tissue from repeated insertions in the same spot. You don’t need to move far. Shifting just a few inches from your last site is enough.
A simple approach is to mentally divide your approved wear area (the back of your upper arm for Libre, the abdomen or back of the arm for Dexcom, depending on the model) into a grid pattern. A 2×2 or 3×3 grid works for most people. Work through one side of your body, then switch to the other side before cycling back. This gives each spot weeks of rest between uses. Avoid placing a new sensor on skin that’s still red, irritated, or scarred from a previous session.
Disposing of Used Sensors
CGM sensors contain a small needle or filament and a tiny battery, which makes disposal less obvious than tossing them in the trash. Because they contain a contaminated sharp, sensors are technically classified as clinical waste and are typically incinerated when handled through proper waste channels. In practice, disposal rules vary by location. Many users place used sensors in a household sharps container, which can be dropped off at pharmacies or local hazardous waste facilities.
If you use FreeStyle Libre sensors, Abbott has launched a sensor take-back pilot program in the United States, where you can mail back used sensors. The collected devices, batteries included, go to specialized waste-to-energy facilities rather than landfills. The scale of the waste is worth noting: roughly 91 million FreeStyle Libre sensors are used worldwide each year. Returning yours through a take-back program, when available, is a small but meaningful step.